Coating applying machine for shoe parts



March 16, 1937. c. A. NEWHALL 2,073,647

COATING APPLYING MACHINE FOR SHOE PARTS Filed Nov. 26, 1954 3 Sheets-Sheet l WVENTUQ- JIQ. i m

March 16, 1937. c. A. NEWHALL 2,073,647

COATING APPLYING MACHINE FOR SHOE PARTS Filed Nov. 26, 1954 3 Sheets-Sheet 2 March 16, 1937. c. A. NEWHALL COATING APPLYING MACHINE FOR sHOE PARTS Filed Nov. 26, 193-4 3 Sheets-Sheet s l/E/V TUR- m G Patented Mar. 16, 1937 PART , Carl A. Newhall, Peabody, Mass, assignor to United Shoe Machinery Corporation, Paterson,

N. J., a corporation of New Jersey Application November 26, 1934, Serial No. 754,891 1 Claims. (01. 91-43) This invention relates to coating applying machines and is herein shown as embodied in a machine for extruding coating material upon shoe parts, of the type shown and described in, I

is arranged to bear upon the coating applied to the work passed beneath the nozzle.

These and other features of the invention are described in the following specification, taken in connection with the-accompanying drawings,

in which Fig. 1 is a front elevation of the machine with parts broken away and in section, and a cover removed; Fig. 2 is a detail in vertical section through the auxiliary pressure chamber and check valve;

Figs. 3 and 4 are fragmentary detail views in elevation and in plan, showing the work gage and the relation thereto or the feed rolls and nozzle;

Fig. 5 is an exploded detail view of the work gage;

Fig. 6 is an angular View ofthe nozzle and spreader viewed from beneath; Fig. 7 is a vertical section through said nozzle and spreader;

Fig. 8 is a horizontal section through the pump and a portion of the tank;

.F g. 9 is a detail section on the lirie IX-I X l 'ig l O is a tviewion a larger scale cover of the tank ipp'edupwith' a fr'agment a 'with a cooperating gear 58.

% Inasmuch as'the machine is capabjle'of 1 .shjafta wreiitfno t o1 aenoyel arrange rvid'ed for ;thispumnmhichirelieves this; pressure v Wand reduces thes'pressure:uponjthepackin fii to This isacc omplishe nd. on which communioatesithrough h :1. 2:ewithrthe?interion of; 1 the... lowerport a shaft journaled in an outwardly extending arm 24 and the lower feed roll is mounted on a shaft 'journaled in a tiltablearm 26. This lower feed roll is adapted to be raised into contact with the work. When a treadle (not shown) connected 5 tea treadle rod 28 is actuated to. move a lever 48, a rod 30 within the frame. is pulled down. As this rod-moves down, it acts upo'n an extension 32 of the arm 26 to lift the lower feed roll' and toraise a piece of work placed thereon into contact 1 with the upper feed roll,.2fl. It also operates through an arm 34. to open a valve 36 in pipe connections 38 leading from the pump I8 to an extruding nozzle 40. A spring (not shown) associated with the treadle returns the .valve 36 -15 to closed position as the treadle isreleased and the lower feed roll 22 is dropped. The clutch l6, as illustrated, is of the positive type, the separable parts being normally held in disconnected relation by means of a spring 42 surrounding the 20 clutch, and is adapted to be moved into closed position by a cam 44 attached to apivot rod 46 to which is secured the lever attached to the treadle rod 28 and to the upright rod 30, respectively. 5 Liquid coating material is supplied to the pump H 88 from a tank 50 mounted onthe top of the. frame and provided with a dependingportion 52, the cross-sectional shape of which isseen in Fig. 8. As there shown, the pump comprises a 30 driven shaft 54 journaled in the pump casting Y and 'providedat one end with a gear 56 meshing Coating material contained inth tank; flowing through an inlet passage 60, isidelivered tothe. lowerside of the 35 cooperating gearsw'and is forced thence-through. an outlet passage r62 (mgr-9) to a pipe .64 In order to prevent leakage of a coating material, a packing 66 surrounds theipumpishaft andis held in compressed relation by a gland 68,, T

ing z a substantiallipressuregin the ,Out'let o i the pump, (there would. be a tendency} ier} this: pres; sure to.- "be .applied' ito kth'e packing 66' 1 along any I ,passagexresulting "from a 1q0segfite0fhat pr vi by l h hydrostat c hea in incl-1mm;- "by. axpassa l0. l1 and. 9? which sur ou ds.thetpumnshait-a :the tankh Thepressuredel,iverjegrv theno z zle is controlled; sin th'epresent machine "by a 1; 1, ,mi ,1

h ap mr a spring-pressed ball valve I4 inserted in a bypass around the pump. This by-pass comprises a passage I6 extending from the inlet passage60 upwardly at an angle to a chamber I8 at one side of the ball valve I4, and also comprises a passage 80 extending from the other side of the ball valve and communicating with another passage 82 opening into the pump outlet 62. The pressure of a spring 84 upon this by-pass valve is determined by a hand screw 86.

The filling of the tank 50 is facilitated by an arrangement shown particularly in Fig. 10, from which it will be seen that a hinged cover 90 of the tank 50 has lugs 92 which will hold the tippedback cover in a horizontal position. This cover has a filling opening 94 surrounding which is a neck 96 with which the neck 98 of a filling can I00 may readily be associated. Any convenient attaching means may be utilized. The bayonetjoint type shown in the drawings comprises fiattened studs I02 on the inside of this neck 96 and a series of inclined flanges I04 upon the neck of the filling can I00 acting as wedges to cooperate with the studs in forcing the top edge of the neck 98 into tight engagement with the cover. Having swung the cover 90 to an open horizontal position, 90 from that shown in Fig. 10, a filled supply can I00 may be raised without spilling its contents and the can secured to the cover by the connection I02, I04. The can may then be swung into the position shown in Fig. 1 and the contents allowed to flow into the tank. In order that there may be no possibility of spilling during this inversion of the supply can, the cover is also provided with a lip or spout I06 extending inwardly from the filling opening 94 on the side thereof adjacent to the hinge so that the initial fiow of material from the can I00 cannot run down the inside of the cover past the hinge on to the outside of the tank but will always be conducted to the inside of the tank 50.

It will be quite obvious that it is desirable to have coating material delivered from the extruding nozzle 40 as soon as the valve 36 is opened and the feed rolls 20 and 22 are brought into gripping relation with the work. But, whenever the pump is stopped and the valve 36 closed, the coating material leaks back through the pump gears and the pressure is lost. The problem is particularly aggravated in those instances in which the separable clutch connectionv I6 is provided between the drive shaft and the pump. As a practical matter, it is impossible to get pressure in the pipe connection 38 until a substantial time after the pump has been started. Consequently, there has been provided between the outlet pipe 64 associated with the pump and the pipe connection 38 leading to the valve 36 a pressure chamber IIO (Fig. 2) closed at its upper end by a cap H2 and opening directly into a T II 4 interposed in the pipe 38. The coating material C will not completely fill this chamber IIO because an air pocket II6 will be formed therein. The .ir in the pocket II6 will be somewhat compressed by the pressure applied by the pump.

Associated with the pressure chamber 0 is a check valve I20 having a spring-pressed ball I22 therein which is so disposed with respect to the passage that the valve is opened by the pressure of coating material coming from the pump. When the pump pressure is relieved, however, the ball I22 will close the passage. Then, whenever the operator controlled valve 36 has closed the pipe connection to the nozzle, the coating material C in the auxiliary pressure chamber IIO will be under pressure because of the compression of the air therein. As a result, opening of the valve 36 when the machine is started will permit the pressure chamber to immediately deliver the fluid to the extruding nozzle 40 and the amount of stored-up pressure will be such that there will be a continuous flow through the nozzle, the pump I8 taking up the work of supplying the nozzle before the pressure in the auxiliary chamber I I0 has disappeared.

Adjacent to the nozzle 40 and the feed rolls 20 and 22 is an improved gage, best shown in Figs. 3, 4, and 5, which utilizes the principle of the gage described in my prior patent but which is so arranged that the points of contact I24 and I26 (Fig. 5) with the edge of a sole S lie upon the peripheries of rolls'I28 and I30. These rolls are journaled on a plate I32. This plate, which is attached to the outer end of the arm 26 (Fig. 3), has tapered, outwardly extending, work-supporting fingers I 34 and I36, and, in order that ultra-flexible soles S may readily be held in engagement with the peripheries of the rolls I28 and I30, overhanging members are associated with these rolls. These members comprise a tapered flange I38 upon the upper end of the roll I28 somewhat overhanging the work and an overhanging beveled end I40 on a plate I42 which overlies the work-engaging portion of the periphery of the roll I30. This plate has an opening I44 to receive the head of the screw stud which supports the roll I30 and an opening I46 to receive a screw which will pass through the plate I42 and the plate I32 into the arm 26. In order that it may be made easier to present work to the rolls, a guard member I48 having an upturned end, I50 is positioned to overlie the rear edge of the first roll I28 thereby forming a recess in which the edge of the sole may be entered as it is presented to the machine. This guard I48 has a downturned end I 52 (Fig. 3) which is attached to the plate I32 by means of a screw I54. It will be understood from Figs. 4 and 5 that the plate I42 is chamfered at I56 and the plate I48 at I58 to avoid interference with the upper feed roll 20. As in the machine of my earlier patent, an idle feed roll 22I is mounted alongside the roll 22 and the plane of the driven feed rolls is angularly related to the line of feed to provide substantially automatic feeding.

The nozzle 40, shown particularly in Figs. 4, 6, and 7, comprises a hollow body portion having a plurality of minute tube-like and preferably capillary outlet passages I60 which communicate with an open-sided recess I62 formed within a rim I64 at the bottom end of the nozzle. This recess is open at the forward end as the work is carried beneath the nozzle in the direction indicated by the arrow in Fig. 6. The nozzle which is supported upon a pivoted arm I66 (Fig. 1) rides on a surface of the work, such as the sole S. The forward side of the hollow body portion is closed by a removable plate I68 against which is pressed a spreader strip I10 of corrugated or ribbed rubber. Being ribbed, no coating material will be removed from the work but it will be well spread or distributed along the length of the applied band. This strip is pressed into place between side flanges I16 which extend in the general direction of movement of the work and are at right angles to the row of passages I60, by means of an L-shaped clamp I12 held in position by a screw I74 passing through a slot, the L-shaped clamp being slotted, as shown in Fig. 4, to receive one of the thin sides I'IB of the body of the nozzle.

The, spreader strip I10 rests upon the work, as illustrated in Fig. 7, and spreads, or rubs in, the stripe of coating material which has been applied through the passages I60. In order that this strip may bear effectively on the work, it is made long enough so that it will normally hang below the end of the nozzleand then, being pushed aside by the work presented thereto, will lie upon the freshly coated surface of the sole. This operation of presenting the work is facilitated by the use in the nozzle of a bent supporting member or deflector I I8 which lies between the rubber strip I10 and the plate I68 forming the side of the nozzle. It will be noted that the lower end of the bent member I18 extends outwardly toward the rubber strip in such a way that it holds it bent slightly forward in the direction of movement of the Work, as shown in Fig. 6, and from which position it is deflected to the position shown in Fig. 7. When the lower end of the strip I10 becomes worn, it may be cut off and, having released the clamp I12, the strip dropped down to present a new portion. For the most effective action of the spreader I10, it has been found desirable to have the ribs thereon extend in the general direction of the line of feed so that there may be as little lateral dragging of the end of the spreader as possible. To secure this desired result, the nozzle has been so disposed that the row: of holes I60 lies along a line substantially normal to the line of feed in order that the ribs of the spreader may lie along the line of feed, even though this disposition of the holes I60 does not conform to the ideal relation set up in my-prior patent mentioned above.

In the use of the machine, a piece, of work, such as a sole S, will be presented with its edge in contact with the rolls I28 and I30 of the'edge gage whereupon the treadle attached to the treadle rod 28 will be actuated to pull down the rod, thus raising the lower feed roll 22 so as to grip the sole between the two feed rolls and to brlngthe work into engagement with the lower end of the nozzle. This same depression of the treadle will also close the clutch it to cause the feed rolls to be driven and the pump to be operated, and will open the valve 36. There will be an immediate flow of coating material from the nozzle because of the compression of the air in the pocket I I6 of the auxiliary pressure chamber H and this will be followed up promptly by pressure supplied from the pump so that there will be no interruption in the flow of coating material. The pressure applied to the coating material will be regulated by adjustment of the hand screw 86 on the by-pass valve and the band of coating material applied through the passages I00 of the nozzle will be smoothed-out, lengthwise of the band, by the action of the ribbed spreader strip I'I0. As in my prior machine, the guiding and feeding actions will be substantially automatic, the sole being held in contact with the edge gagesby reason of the angular position of the upper feed roll 20 with respect to the line of feed. The stripe of coating material applied by the nozzle will be, of uniform width and at a uniform distance from the edge of the sole by reason of the relation of the line of the roll passages I 80 with respect to the contact point I26 of the edge gage. When the supply of coating material in the tank 50 is exhausted, a new supply can I00 will be applied thereto by tipping back the cover 90, detaching one supply can and substituting another, each being held in upright position. The supply can and the cover may then be turned back into operating position, whereupon the coating material flowing out of the can will be carried over the spout I06 to the tank 50 without any leakage.

Having thus described my invention, what I claim as new and desire to secure byLetters Patent of the United States is: v

1. In a machine for applying coating material, a tank to hold a supply of coating material, means for filling said tank comprising a hinged cover therefor, said cover having a filling opening, and means for attaching a supply can of coating material to the cover to seal the opening whereby the open can of coating material may be attached to the cover While the can is in upright position and then inverted with the cover to drain into the tank.

2. In a machine for applying coating material, a tank to hold a supply of coating material, means for filling said tank comprising a hinged cover therefor, said cover having a filling opening and a neck around said filling opening, and means for attaching. a supply can to said neck constructed and arranged to make a tight fit between the cover and the can and to support the can on the cover when the cover and can are inverted, thereby to permit the contents of the can .to drain into the tank.

3. In a machine for applying coating material, a tank to ,hold a supply of coating material, means for filling said tank comprising a hinged cover therefor, said cover having a filling opening, said cover also having a spout extending inwardly from its inner surface between said opening and the hinge point, and means for securing a supply can to the outer surface of the cover. whereby the supply can may be attached to the cover while the can is in upright position and then the cover and the can turned together to invert the can and to drain the coating material into the tank, said spout conducting coating material to the inside of the tank without permitting it to run down outside of the tank during the interval while the can is being inverted.

4. In a machine for applying coating material, a hollow frame, a tank carried on the upper side of the frame and having a depending hollow portion forming a side for said frame, and a hinged cover for said tank having a filling opening and provided with a spout on its inner surface and a can supporting neck on its outer surface.

5. In a machine for applying coating material, a nozzle having a work contacting end provided with an. open-sided recess, said nozzle having at least one passage through the nozzle and having its outlet opening within said recess, a flexible spreader associated with said nozzle adjacent to the open side of the recess, means for clamping said spreader to the nozzle, and means for holding the end of the spreader away from the nozzle in a-position where it will drag on the work as relative movement is produced between the work contacting end of the nozzle and a piece of work.

6. In an extruding-machine, a rigid hollow nozzle having a work-contacting end portion provided with a U-shaped recess the open end of which is at the leaving side of the nozzle, said nozzle having at least one passage opening into the recess with its outlet end removed from contact with the work, and a flexible spreader strip associated with the nozzle adjacent to the open end of the recess and normally extending beyond the work-contacting end of the nozzle, the workcontacting face of said spreader strip being ribbed whereby coating material extruded from said nozzle will be spread over the surface of the work by the ribbed spreader strip without wiping fromthe work any substantial amount of the extruded material.

7. In a, machine for applying coating material, a. nozzle one end of which is adapted to contact with the work, a passage through the nozzle terminating adjacent said work contacting end thereof, a resilient spreader strip releasably supported on the work-leaving side of the nozzle and arranged to bear upon the work, said strip being long enough to permit a worn lower end to be severed and a fresh portion brought down into operative position, the resilience of said spreader tending to move it to a position, when free, where the end of the spreader will be below the nozzle, and a deflector associated with the free end of said spreader thereby to hold it away from the nozzle in the direction of movement of the work.

8. In a machine for applying coating material, a nozzle yieldably supported in depending position and adapted to contact with a piece of work to be coated as the latter is moved under the nozzle thereby to present successive portions of the work thereto, a resilient spreader secured to the work-leaving side of the nozzle and comprising a strip of rubber long enough to depend below the nozzle when no work is presented, and

a deflector interposed between the nozzle and the end of the spreader thereby to hold the end of the spreader away from the nozzle in the direction of movement of the work.

9.- In a machine for applying coating material, a nozzle having a work contacting end provided with an outlet opening past which a piece of work may be moved to present successive portions to the nozzle, said nozzle having side flanges extending in the direction of movement of the work, a resilient spreader strip clamped to the nozzle between said side flanges and constructed and arranged normally to depend below the nozzle, and a deflector interposed between the nozzle and the free end of the spreader strip thereby to hold it away from the outlet of the nozzle in a direction substantially parallel to the sides of the nozzle and to the direction of movement of the work.

10. In a machine for extruding coating material, an applying nozzle having a plurality of small outlet openings arranged in a row, said nozzle having forwardly extending side flanges positioned substantially normal to the row of holes, a spreader strip clamped between said side flanges, and guide means comprising work engaging rolls spaced in the direction of feeding movement for determining a line of feed which CARL A. NEWHAIL.

is substantially at right angles to the row of holes. 30 

